A crow in a hemlock tree shakes a light dusting of snow onto the speaker, and that tiny, accidental moment shifts his whole outlook. He had been in a gloomy, regretful mood — the day was one he “had rued” — but the soft fall of snow is enough to change his heart and save part of the day. The language is plain and the scene is almost stark: black crow, dark hemlock, white snow. There is no dramatic event, just a small natural occurrence. Yet Frost treats it as a quiet kind of rescue. The mood is wintry and still, but also gently hopeful, as if beauty or luck can interrupt despair when we least expect it and give back a piece of the day we had already written off.
Dust of Snow — Summary
The way a crow Shook down on me The dust of snow From a hemlock tree
Has given my heart A change of mood And saved some part Of a day I had rued.